Research
Environmental
Vehicle-Derived Particulate Matter
New research on transit bus and light-duty vehicle emissions is relatively unique because of the researcher's interest in real-world, on-road data collection. For example, we have
designed sampling systems to enable real-time measurement of particle emissions from diesel and Connecticut's first two diesel hybrid-electric transit buses as the buses drive
actual routes in Hartford. Three different bus routes, two fuels and the effects of diesel particulate filters on the particle emissions are being compared to help transit agencies
evaluate the best solution for meeting tightening air quality standard emission targets.
Dr. Britt A. Holmén, P.I.
Describing Modal Operating Events for Light Duty Vehicle Emission Models
Researchers at CTI are collecting real-world PM tailpipe emissions with an on-board condensation particle counter (CPC) for a single automobile and 20 different drivers while
concurrent acceleration, velocity and position within the transportation network are measured by GPS, a scantool and accelerometers. Gas emissions are being measured with a
5-gas analyzer. Researchers hope to use these data to understand tailpipe emission differences between drivers, locations in the transportation network and vehicle operating
conditions. Dr. Lisa Aultman-Hall and Dr. Britt Holmén, P.I.s
New website launched!